Question

Which one of the following pair is not a factor for respiration?

• A. Water and Oxygen
• B. Food and Concentration of Carbon dioxide
• C. Oxygen and Concentration of Carbon dioxide
• D. Temperature and Food

Answer 1

The correct option is C Oxygen and Concentration of Carbon dioxide

Respiration occurs by two modes, aerobic respiration that needs oxygen as electron acceptor, anaerobic respiration that does not need oxygen as electron acceptor. Within anaerobic respiration also, lactic acid fermentation does not release carbon dioxide. However, food is a must requirement for respiration. Temperature maintenance is also a factor for the proper functioning of enzymes. Water acts as a medium for the cellular biochemical reactions.

Hence, the correct answer is 'Oxygen and concentration of carbon dioxide'